Prioritization of third party access to an online commerce site

ABSTRACT

Providing prioritization of user online access to an online commerce site. Third party applications using API function calls to access an online commerce site are restricted to specific services by an access rule. An access rule defines which API server on the online commerce site a specific third party application may access when using a specific API function call. In this way, the operator of the online commerce site may prioritize server access per service level agreements based on a specific third party application and API function call.

PRIORITY APPLICATION

This application is a continuation application of U.S. Utility application Ser. No. 10/025,267, filed on Dec. 18, 2001, which application is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to the field of network computing. More specifically, the invention relates to the prioritization of third party access to an online commerce site.

2. Background of the Invention

The online commerce marketplace allows users to buy and sell goods and services (e.g., via an online auction web site) to geographically dispersed consumers. Typically, a user employs automated processes to buy or sell their own products on the online commerce site. By partnering with an established online commerce site, a user (e.g., a merchant) bypasses the cost of building an online commerce infrastructure from scratch, thereby reaching the online market quickly and accessing a large number of good and services in addition to a large number of buyers and sellers.

Permitting uncontrolled access to the online commerce site has some drawbacks, such as the drain on system resources due to the increased processing performed on the online commerce site. For example, a third party may utilize an automated program to extract information such as product listings and pricing information, from the online commerce site at various unpredictable times. The automated program may place a heavy load on the online commerce site that causes substantial response time delays to all users of the online commerce site. These response time delays may eventually frustrate the consumers of the site, causing them to cease using the online commerce site and seek another electronic commerce site from which to conduct business.

BRIEF SUMMARY OF THE INVENTION

Providing prioritization of user online access to an online commerce site. Third party applications using API function calls to access an online commerce site are restricted to specific services by an access rule. An access rule defines which API server on the online commerce site a specific third party application may access when using a specific API function call. In this way, the operator of the online commerce site may prioritize server access per service level agreements based on a specific third party application and API function call.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention may best be understood by referring to the following description and accompanying drawings that are used to illustrate embodiments of the invention. In the drawings:

FIG. 1 illustrates an online commerce system according to one embodiment.

FIG. 2 is a flow diagram illustrating access rule processing on an online commerce site according to one embodiment.

FIG. 3 is a flow diagram illustrating a process of using access rules on a third party application server according to one embodiment.

FIG. 4 illustrates a flow diagram of one embodiment of using access rules and rate usage limits on an online commerce server.

FIG. 5 depicts an exemplary computer system suitable for practicing the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In the following description, numerous specific details are set forth to provide a thorough understanding of the invention. However, it is understood that the invention may be practiced without these specific details. In other instances, well-known circuits, structures and techniques have not been shown in detail in order not to obscure the invention.

Prioritization of user online access to an online commerce site is described. According to one embodiment, an online commerce merchant configures an access rule to prioritize third party online access. An access rule defines how a third party may access the online commerce site. For example, a user may be limited, with an access rule, to a specific service on a specific server on the online commerce site, thereby, providing predictability to the operator of an online commerce site as to user accesses the online commerce site. In this way, the operator of an online commerce site may negotiate a service level agreement to provide access to specific servers with predetermined service levels as will be further described below.

FIG. 1 illustrates an online commerce 100 system according to one embodiment. A third party server area 102, a network area 104, and online commerce site 106, partitions the online commerce system 100.

The third party server area 102 includes third party application servers 110 and 115. The online commerce area 106 includes Application Program Interface (API) servers 140, 142, and 144, and data storage devices 150, 152, 154, and 156. Any of the API servers 140, 142, and 144 may access any of the data storage devices 150, 152, 154, and 156. The network area 104 includes a network 130 (e.g., the Internet). The network 130 provides connectivity between any of the third party application servers 110 and 115 in the third party server area 102 and any of the API servers 140, 142, and 144 of the online commerce site 106. Access by the third party application servers 110, 115 may be prioritized based on a service level agreement, across the multiple API servers 140, 142, 144, as will be further described below.

Generally, third party developers create applications on the third party application servers 110 and 115 to access information and services available in the online commerce site 106 in a client/server type environment. For example, where the online commerce site 106 operates as an online auction site, the online auction site may store pricing and product information in the data storage devices 150, 152, 154, and 156. The application hosted by the third party application server 110, 115 may use a HTML form or CGI program using the standard XML (eXtensible Markup Language) data format, and may be written in C++, Perl, Pascal, or any other programming language capable of issuing data requests via the network 100 (e.g., the Internet). In one embodiment, each third party application hosted by the third party application servers 110, 115 uses APIs (application programming interfaces) to access the services provided by the online commerce site 106. In general, APIs are standard programming interfaces (i.e., contracts) that define the input and output of function calls published by the online commerce site 106 to third party software programmers to automate access to services on the online commerce site 106 efficiently via application programs (e.g., to create an application to conduct auctions, and to manage auction and user information).

In one embodiment, a third party application must obtain access rule(s) before accessing the services on the online commerce site 106. For example, an access rule may include a URL (uniform resource locator) that addresses the API server 140, 142, or 144, with which the third party application 110 and 115 is to connect (or communicate) when accessing the services of the online commerce site 106. In this way, the URL directs a specific user to a specific API server on the online commerce site 106 per the service level agreement. The access rule may also be configured to direct a specific user to a specific API server having a different service level based on the specific API function call to be used. For example, the third party application server 110 may be directed (via a URL stored in an access rule) to connect to API server 140 when servicing a “GetItem” API function call to retrieve information describing an item offered for sale via the online commerce site 106.

The access rule(s) are configured on the online commerce site 106. For example, an administrator of the online commerce site 106 may configure access rules stored in the data storage device 150 via the administrator portal 160. In one embodiment, each rule has a record in a database table that corresponds to one API function call type. Specifically, the table includes a field for a Rule_ID, an APP_ID, a CallName, and a URL for each API function call. The Rule_ID field stores an identifier for a specific rule. The App_ID field stores the identifier of the third party application. The CallName field stores the name of an API function call. The URL field stores the URL that the third party application should use when utilizing the API function call associated with the CallName. In this way, the administrator configures each access rule per the service level agreement to an API function used by a specific third party application to connect (via a given URL) to a specific API server. The access rule may also include rate usage information that limits third party application access as will be further described below.

In one embodiment, the access rule(s) are resident on the third party application server before the third party application accesses the services of the online commerce site 106. The third party application may request the access rule(s) from the online commerce site 106 using an API function call as will be further described below.

It should be appreciated that in this way, the online commerce merchant may prioritize access of third party application servers 110 and 115 to API servers 140, 142, 144 on the online commerce site 106. For example, the online commerce merchant may negotiate to provide a premium service level (e.g., guarantee faster response time) to third party application server 110 and provide a standard service level to the third party application server 115. The API server 142 may be designated as a premium server (for example, because a minimum number of third party applications have access to the API server 142, the API server 142 has additional resources and services available, among other examples), while the API server 144 may be designated as a standard server. Therefore, an access rule associated with an application on the third party application server 110 defines connectivity to the API server 142 for the premium service requests and an access rule associated with an application on the third party application server 115 defines connectivity to the API server 144 for the standard server requests.

A third party application may schedule the request for access rule(s) on a periodic basis (e.g., nightly). In this way, the third party application may receive any access rule updates performed by the administrator after analyzing the usage pattern of all third party applications. Continuing the example, if it is determined that the response time provided by the premium service on the API server 142 is not acceptable, then an administrator may modify the appropriate access rule to redirect the third party application server 110 to connect to a premium service on the API server 144 instead of connecting to API server 142 as previously defined.

FIG. 2 is a flow diagram illustrating access rule processing on the online commerce site 106 according to one embodiment.

At block 210, the API server 140 receives a request for an access rule from a third party application. As stated above, the request may originate from an API function call. In one embodiment, the function call request is passed from a third party application to the online commerce server 106 via a URL request string. By using a URL request string, through the HTTP transport protocol, to make the API function call the API function is rendered-platform independent. Therefore, the third party application may be on any Internet capable machine including Microsoft Windows, Unix, Linux, or Macintosh computer, among others.

At decision block 220, the API server 140 determines whether the request is a valid. In one embodiment, the request includes an application identifier, a developer identifier, and a session certificate. The application identifier identifies the third party application that transmitted the request. In one embodiment, a session certificate is a string of characters unique to a third party application. The session certificate string for the third party application is passed along with the developer identifier and the application identifier for each API function call type and is used by the API server 140, 142, and 144 to validate the request.

At block 225, the request is not validated and a descriptive message of the error result is returned back to the requesting third party application.

At block 230, if the third party application request is validated, the access rule(s) for the predefined service levels for the identified third party application are returned to the requesting third party application. For example, the API server 140 may access an access rules database table on the data storage device 150 for all the access rules associated with the application identifier of the request. Each access rule to be returned to the requesting third party application includes a CallName and a URL that the third party application should use when making a API function call associated with the CallName, as will be further described. In this way, the third party application will be directed to the API server 140, 142, 144 providing the appropriate service level.

FIG. 3 is a flow diagram illustrating a process of using access rules on a third party application server according to one embodiment. At block 310, the third party application makes a request for access rules to an API server. The request may be made to a predefined API Server or to any of the API Servers on the online commerce site 106.

At block 320, the third party application receives the appropriate access rules. Upon receiving an access rule, the third party application saves the access rule in a data store such as a storage device, a memory, and a database, for example.

At block 330, the third party application intends to perform an API function call to the online commerce site 106. Examples of API functions for an online auction site include: an AddItem function (sends a request to the online commerce site to put an item up for auction), a GetItem function (used to query the online commerce site and retrieve the information for one auction item); a GetSellerList function (queries the online commerce site and retrieves a list of the items a specific user/merchant is selling); a GetSearchResults (searches for items on the online commerce site); among other examples. Further examples of APIs to access an online auction site are described in the patent application entitled “Method and Apparatus to Facilitate a Transaction within a Network-Based Auction Facility”, Ser. No. 09/999,618, Assigned to eBay, Inc.

At block 340, the URL from the access rule associated with intended API function call is obtained. The URL is retrieved from the access rule in the data store having a CallName associated to the intended API function call. Again, the URL may direct the user to the API server servicing the negotiated service level.

At block 350, upon obtaining the appropriate URL, the third party application applies the intended API function call to the appropriate API server on the online commerce site 106.

FIG. 4 illustrates a flow diagram of one embodiment of using access rules and rate usage limits on an online commerce site. At block 410, an API server 140-144 receives a request to access the services on the online commerce site 106. As stated above, the request may for example be an API function call for a list of seller items (e.g., GetSellerItemList API function).

At decision block 420, a validation is performed on the request. If the request is validated, control passes to block 425. If the request is not validated, control passes to block 430. The application identifier, developer identifier, or session certificate, or any combination thereof, included in an API function call header, may be used to validate the request based on the associated (or matching) access rule stored on the online commerce site 106.

Validation may also include determining whether the requesting API function call is to the appropriate API server. The third party application may connect to API server to which it has been assigned in the access rule. Continuing the example, if the access rule for the third party application server 115 defines the GetItemList API function to be made to API server 142 (via the URL stored in the access rule associated with the GetitemList API function), then a validating API server will validate that a request is made to the appropriate API server 142.

At block 425, the request is not validated and a descriptive message is returned back to the requesting third party application.

At block 430, the appropriate API server determines whether the third party application has exceeded a predefined maximum rate usage level. For example, the administrator may limit the third party application to perform a certain number of transactions per unit of time (e.g., 80,000 searches per day). If the third party application has exceeded the maximum rate usage, control passes to block 460. If the third party application has not exceeded the maximum rate usage, control passes to block 440. In this way, block 430 operates like a circuit breaker to limit third party access if it exceeds the agreed-upon transaction limits.

In another embodiment, block 430 may determine whether the third party application has exceeded other predefined maximum rate usage levels, such as, the maximum number of calls within a predefined time frame (e.g., per day, per hour), the maximum number of simultaneous calls, whether the call is during a predefined time of day, among other examples.

At block 440, the third party application has not exceeded the maximum rate usage level, therefore, the API function call is performed, and if necessary, a usage rate counter increased. Continuing the example, the number of transaction results performed may be added to the maximum rate usage counter for the specific third party application. The maximum rate usage counter value may be stored in memory of the API server or in one of the databases 150, 152, 154, and 156.

At block 445, the API server returns the transaction results up to the maximum rate usage level. Therefore, if the third party application reaches the maximum rate usage upon performing the requested transaction, only those transactions that are below the maximum rate usage level are transmitted to the third party application. Control then passes to block 445.

At block 460, the third party application has exceeded the maximum rate usage and a descriptive message is returned back to the requesting third party application.

One embodiment of an API server suitable for managing access rules is illustrated in FIG. 5. The computer system 540 includes a processor 550, memory 555 and input/output capability 560 coupled to a system bus 565. The memory 555 is configured to store instructions which, when executed by the processor 550, perform the methods described herein. The memory 555 may also store access rules. Input/output 560 provides for the delivery and display of software to a device and allows for the modification of the access rules thereof. Input/output 560 also encompasses various types of machine-readable media, including any type of storage device (e.g., preference database 240) that is accessible by the processor 550. The description of FIG. 5 is intended to provide an overview of computer hardware and other operating components suitable for implementing the invention, but is not intended to limit the applicable environments. It will be appreciated that the computer system 540 is one example of many possible computer systems, which have different architectures. A typical computer system will usually include at least a processor, memory, and a bus coupling the memory to the processor. One of skill in the art will immediately appreciate that the invention can be practiced with other computer system configurations, including multiprocessor systems, minicomputers, mainframe computers, and the like. The invention can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. It will be appreciated that more or fewer processes may be incorporated into the method illustrated in FIGS. 2 and 3 without departing from the scope of the invention and that no particular order is implied by the arrangement of blocks shown and described herein. It further will be appreciated that the method described in conjunction with FIGS. 2 and 3 may be embodied in machine-executable instructions, e.g. software. The instructions can be used to cause a general-purpose or special-purpose processor that is programmed with the instructions to perform the operations described. Alternatively, the operations might be performed by specific hardware components that contain hardwired logic for performing the operations, or by any combination of programmed computer components and custom hardware components. The method may be provided as a computer program product that may include a machine-readable medium having stored thereon instructions, which may be used to program a computer (or other electronic devices) to perform the method. For the purposes of this specification, the terms “machine-readable medium” shall be taken to include any medium that is capable of storing or encoding a sequence of instructions for execution by the machine and that cause the machine to perform any one of the methodologies of the present invention. The term “machine-readable medium” shall accordingly be taken to include, but not be limited to, solid-state memories, optical and magnetic disks, and a carrier wave that encodes a data signal. Furthermore, it is common in the art to speak of software, in one form or another (e.g., program, procedure, process, application, module, logic . . . ), as taking an action or causing a result. Such expressions are merely a shorthand way of saying that execution of the software by a computer causes the processor of the computer to perform an action or a produce a result.

It should be appreciated that by providing third party applications access rules to determine which API server to access, the online commerce merchant may prioritize and control the manner in which the third party applications access the online commerce site 106. The online commerce site 106 may prioritize access by class of customer or service being accessed when needed to achieve any necessary service level. In this way, premium services may be provided to specific third party applications thereby guaranteeing availability of services on the premium site, among other advantages.

In addition, only those third party applications and API function calls that have the appropriate access rule may access the API server, thereby preventing other parties from sharing services by using a specific URL assigned to another third party application. Also, since a single third party application may access different API servers based on the specific API function call, the invention also prevents the third party user from arbitrary selecting any one of the API servers.

Although the exemplary embodiment of described herein details how an online auction merchant prioritizes third party application requests from API function calls with access rules, it should be understood that the invention is not limited to prioritizing third party application's access to an online auction site. Alternatively, an access rule may be used to prioritize access to alternative online commerce environments and to alternative services provided by an online commerce facility.

Although the invention describes how a third party application connects to an API server, in alternative embodiments, the third party application connects to an API server pool (e.g., multiple API servers) that are controlled by a resonate load balancer and respond to the same URL. Load balancing network topologies are well know in the art and have not been described in detail in order not to obscure the invention.

It is also understood that access rules may be delivered to a third party application server via means other than the API function described. In alternative embodiments, the access rules may be transferred to the third party application server by other well-known file transfer mechanisms within the scope of the invention. In addition, in some embodiments the access rules are preemptively not transferred to the third party application server but the third party application server searches access rules on the online commerce site before performing a specific API function to determine which API server to connect when accessing the online commerce site 106.

While the invention has been described in terms of several embodiments, those skilled in the art will recognize that the invention is not limited to the embodiments described. The method and apparatus of the invention can be practiced with modification and alteration within the spirit and scope of the appended claims. The description is thus to be regarded as illustrative instead of limiting on the invention. 

1. A method to provide access to services of an online commerce site that includes a plurality of servers, the method including: responsive to a request received from a user, determining an identity of the user; identifying a first server of the plurality of server to which to direct the user for service by the online commerce site; and transmitting an identifier for the first server to the user so as to enable the user to direct a request for service to the first server of the plurality of servers.
 2. The method of claim 1 wherein the first server of the plurality of servers identified based on the identity of the user.
 3. The method of claim 1 wherein the plurality of servers include a second server that provides a service level different from that of the first server, and wherein the first server of the plurality of servers is satiated with the user based on a service level agreement between the user and the online commerce site.
 4. The method of claim 1 wherein the plurality of servers include API servers for servicing API function calls received from the user.
 5. The method of claim 4 wherein the identifying the first server of the plurality of servers to which to direct the user for service further includes identifying the first server of the plurality of servers to which to direct based on the API function call.
 6. The method of claim 1 wherein the online commerce site is a network-based auction site.
 7. The method of claim 1 wherein the identifier for the first server to the user so as to enable the user to direct a request for service is an access rule.
 8. The method of claim 1 wherein the identifying further includes searching a database table for a record containing the identifier to reply to the client.
 9. The method of claim 1 wherein the identifier for the first server to the user so as to enable the user to direct a request for service is a URL.
 10. A method to facilitate access to an online commerce site, the method including: receiving a request from a client at the online commerce site for an access rule; and replying to the request with the access rule, the access rule being to direct the client to an API server upon performing an API function call.
 11. The method of claim 10 wherein the API function call is to perform a function to facilitate the online commerce.
 12. The method of claim 10 wherein the API function call is to retrieve information regarding items that are available for transaction via the online commerce site.
 13. The method of claim 10 wherein the access rule includes a URL that addresses the API server.
 14. The method of claim 10 wherein the access rule includes a CallName that describes the API function call associated with the access rule being returned.
 15. The method of claim 10 wherein the request includes an application ID to identify the access rule being returned.
 16. The method of claim 10 wherein the request includes a developer ID to identify the access rule being returned.
 17. The method of claim 10 wherein the request includes a session certificate in order to validate the client making the request.
 18. The method of claim 10 further including: responsive to receiving the request from the client, searching a database table for a record containing the access rule to reply to the client.
 19. The method of claim 18 wherein the searching of the database table is to locate an access rule based on an identity of the client.
 20. The method of claim 10 wherein the online commerce site includes a plurality of API servers, and the access rule is to direct the client to the API server in order to provide the client with a predetermined level of service associated with the API server.
 21. A method to facilitate access to an online commerce site, the method including: receiving a request to access a service on a server, the request including an identifier of a client; and validating the request based on an access rule stored on the server associated with the identifier.
 22. The method of claim 21 wherein the validating includes validating the request based on whether a URL in the access rule is associated with the server.
 23. The method of claim 21 wherein the identifier is an application identifier.
 24. The method of claim 21 wherein the identifier is a developer identifier.
 25. The method of claim 21 wherein the identifier is a session certificate.
 26. The method of claim 21 wherein the identifier is a CallName.
 27. The method of claim 21 further including providing the access to the service.
 28. The method of claim 21 wherein the server is an online auction server.
 29. A method to facilitate access to an online commerce site, the method including: requesting an access rule from a server; receiving the access rule, the access rule includes a URL of an API server; and performing an API function call to the URL of the API server.
 30. The method of claim 29 further includes storing the access rule in a data store.
 31. The method of claim 30 further including obtaining the URL associated to the API function from the access rule stored in the data store.
 32. The method of claim 29 wherein the requesting being periodically scheduled to be performed.
 33. The method of claim 29 wherein the server is an online commerce auction server.
 34. A method to facilitate access to an online commerce site, the method including: searching for an access rule in a data store, the access rule includes a URL of an API server; and performing an API function call to the URL of the API server.
 35. A method to facilitate access to an online commerce site, the method including: receiving a request from a client to perform a transaction on a server; determining the client has not exceeded a maximum rate usage level; and performing the requested transaction.
 36. The method of claim 35 wherein the maximum rate usage level is a maximum number of transactions.
 37. The method of claim 35 wherein the maximum rate usage level is a maximum number of calls per day.
 38. The method of claim 35 wherein the maximum rate usage level is a maximum number of calls per hour.
 39. The method of claim 35 wherein the maximum rate usage level is a maximum number of simultaneous calls.
 40. The method of claim 35 wherein the maximum rate usage level the time of day.
 41. The method of claim 35 wherein the request is from an API function call.
 42. The method of claim 35 wherein the server is an online auction server.
 43. The method of claim 35 wherein the performing includes increasing the rate usage counter and returning a number of transaction results up to the number the maximum rate usage.
 44. A system, including: a network; an application server capable of making a API function call; and an API server to transmit an access rule to the application server via the network upon receiving a request for the access rule from the application server, the access rule includes a URL.
 45. The system of claim 44 wherein the API server validates the API function call based on whether an identifier stored in the request is associated with an identifier stored in the access rule.
 46. The system of claim 45 wherein the API server validates the API function call based on whether the URL in the access rule is associated with the API server.
 47. The system of claim 44 wherein the API function call is via a URL request string.
 48. The system of claim 44 wherein the application server stores the retrieved access rule in a data store.
 49. The system of claim 44 wherein the application server obtains the URL from the retrieved access rule to determine an API server to make a transaction request within an API function call.
 50. The system of claim 44 wherein the API server receives the transaction request and performs the transaction request upon determining whether the maximum usage rate limit is not exceeded.
 51. A machine-readable medium having executable instructions to cause a machine to perform a method including: receiving a request from a client at an online commerce site for an access rule; and replying to the request with the access rule, the access rule being to direct the client to an API server upon performing an API function call.
 52. The machine-readable medium of claim 51 wherein the API function call is to perform a function to facilitate the online commerce.
 53. The machine-readable medium of claim 51 wherein the API function call is to retrieve information regarding items that are available for transaction via the online commerce site.
 54. The machine-readable medium of claim 51 wherein the access rule includes a URL that addresses the API server.
 55. The machine-readable medium of claim 51 wherein the access rule includes a CallName.
 56. The machine-readable medium of claim 51 wherein the request includes an application ID to identify the client.
 57. The machine-readable medium of claim 51 wherein the request includes a developer ID to identify the client.
 58. The machine-readable medium of claim 51 wherein the request includes a session certificate to identify the client.
 59. The machine readable medium of claim 51 further including: responsive to receiving the request from the client, searching a database table for a record containing the access rule to reply to the client.
 60. The machine readable medium of claim 51 wherein the searching of the database table is to locate an access rule based on an identity of the client.
 61. The machine readable medium of claim 51 wherein the online commerce site includes a plurality of API servers, and the access rule is to direct the client to the API server in order to provide the client with a predetermined level of service associated with the API server.
 62. A machine readable medium having executable instructions to cause a machine to perform a method including: receiving a request to access a service on a server, the request including an identifier of a client; and validating the request based on an access rule stored on the server associated with the identifier.
 63. The machine-readable medium of claim 62 wherein the validating includes validating the request based on whether a URL in the access rule is associated with the server.
 64. The machine-readable medium of claim 62 wherein the identifier is an application identifier.
 65. The machine-readable medium of claim 62 wherein the identifier is a developer identifier.
 66. The machine-readable medium of claim 62 wherein the identifier is a session certificate.
 67. The machine-readable medium of claim 62 wherein the identifier is a CallName.
 68. The machine-readable medium of claim 62 further including providing the access to the service.
 69. The machine-readable medium of claim 62 wherein the server is an online auction server.
 70. A machine readable medium having executable instructions to cause a machine to perform a method including: requesting an access rule from a server; receiving the access rule, the access rule includes a URL of an API server; and performing an API function call to the URL of the API server.
 71. The machine-readable medium of claim 70 further includes storing the access rule in a data store.
 72. The machine readable medium of claim 71 further including obtaining the URL associated to the API function from the access rule stored in the data store.
 73. The machine-readable medium of claim 70 wherein the requesting periodically scheduled to be performed.
 74. The machine-readable medium of claim 70 wherein the server is an online commerce auction server.
 75. A machine-readable medium having executable instructions to cause a machine to perform a method including: searching for an access rule in a data store, the access rule includes a URL of an API server; and performing an API function call to the URL of the API server.
 76. A machine-readable medium having executable instructions to cause a machine to perform a method including: receiving a request from a client to perform a transaction on a server; determining the client has not exceeded a maximum rate usage level; and performing the requested transaction.
 77. The machine-readable medium of claim 76 wherein the maximum rate usage level is a maximum number of transactions.
 78. The machine-readable medium of claim 76 wherein the maximum rate usage level is a maximum number of calls per day.
 79. The machine-readable medium of claim 76 wherein the maximum rate usage level is a maximum number of calls per hour.
 80. The machine-readable medium of claim 76 wherein the maximum rate usage level is a maximum number of simultaneous calls.
 81. The machine-readable medium of claim 76 wherein the maximum rate usage level the time of day.
 82. The machine-readable medium of claim 76 wherein the request is from an API function call.
 83. The machine-readable medium of claim 76 wherein the server is an online auction server.
 84. The machine-readable medium of claim 76 wherein the performing includes increasing the rate usage counter and returning a number of transaction results up to the number the maximum rate usage. 